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Overburden (OB) material refers to the topsoil that rests above the coal seam and comprises small clay particles to large rock fragments. This material contains fewer harmful elements and is typically disposed of in open areas as untreated heaps, making open dumping unsafe. The failure of these heaps can result in significant loss of life and property, as well as environmental damage. This paper focuses on OB material’s mineralogical and engineering characteristics and its potential use as a base or sub-base material in pavement construction. Various studies have demonstrated improved unconfined compressive strength and California Bearing Ratio properties with the addition of different admixtures. Treatment of OB material with additives such as GGBS, Fly ash, and Cement has shown significant improvements in strength and enhanced resistance to dispersivity. The formation of cementitious reactions and the achieved density by filling voids between the waste and admixtures contribute to improving the unconfined compressive strength (UCS) of the base layers. By exploring these aspects, this review aims to contribute to developing sustainable pavement construction that effectively utilizes OB material.

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State-Of-The-Art Review on the Utilization of Coal Mine Overburden Waste as a Pavement Material

  • 会议论文

  • 发表日期：

    2025年

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  • Veera Sai Durga Hanuman Bainapudi,
  • Sai Sharanya Hanamkonda,
  • Naveen Kumar Chowdam,
  • Snehasree Narlagiri,
  • Arif Ali Baig Moghal

摘要

Overburden (OB) material refers to the topsoil that rests above the coal seam and comprises small clay particles to large rock fragments. This material contains fewer harmful elements and is typically disposed of in open areas as untreated heaps, making open dumping unsafe. The failure of these heaps can result in significant loss of life and property, as well as environmental damage. This paper focuses on OB material’s mineralogical and engineering characteristics and its potential use as a base or sub-base material in pavement construction. Various studies have demonstrated improved unconfined compressive strength and California Bearing Ratio properties with the addition of different admixtures. Treatment of OB material with additives such as GGBS, Fly ash, and Cement has shown significant improvements in strength and enhanced resistance to dispersivity. The formation of cementitious reactions and the achieved density by filling voids between the waste and admixtures contribute to improving the unconfined compressive strength (UCS) of the base layers. By exploring these aspects, this review aims to contribute to developing sustainable pavement construction that effectively utilizes OB material.